Suddenly, i lost all Geny motion emulators (maybe after upgrading to Geny motion 2.2, not sure) and when ever i download a new virtual machine or emulator i get the \"failed
I had the same issue and also tried deleting the Genymotion cached .ova file and old images but to no avail.
To get my Genymotion working again in my environment I completely uninstalled VirtualBox and Genymotion using the TrashMe app to ensure no trace was left on my system. You can achieve the same result with the free app App Cleaner.
I then completely deleted the ~/.Genymobile directory as this seems to get left behind when deleting/uninstalling Genymotion. I think this is the only thing I did differently this time.
I then re-downloaded the latest versions of VirtualBox and Genymotion and installed them in that order. (Versions at time of writing: VB - 4.3.13 r93733 / GM - 2.2.2)
I then launched Genymotion, connected to my account, added a new device and I am now back up and running.
Hopefully that helps..